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 Post subject: Can HDD with hidden errors still be considered reliable?
PostPosted: January 28th, 2016, 8:57 
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Joined: October 25th, 2010, 11:50
Posts: 58
Location: Faraway
Would you install your operating system to HDD which once has been failed with errors detected?
Now MHDD can't find any errors.
Even if PC is of home user and not much of importance, it still requires a lot of time to install.

Manufacturer's hide errors and likely want end users to believe there is no risk continuing to use such device.
Smart is usually rather difficult to interpret and often not much of help there either.

History:
Seagate ordinary 2TB HDD with Windows 7 boot partition.
Windows 7 failed to start and couldn't be recovered from restore points.
MHDD test find 2-3 errors.

Disk was considered faulty and replaced with new HDD.

A week later MHDD didn't found any errors on this old disk.
I guess bad sectors were just relocated.

Does it means disk is now healthy or still unreliable and better to avoid using?
Also it's difficult to receive RMA accept to such HDD which passes tests.


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 Post subject: Re: Can HDD with hidden errors still be considered reliable?
PostPosted: January 28th, 2016, 9:09 
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Joined: March 19th, 2015, 15:01
Posts: 1288
Location: isreal
IMHO even a brand new out of box is not reliable, because it's called seagate


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 Post subject: Re: Can HDD with hidden errors still be considered reliable?
PostPosted: January 28th, 2016, 10:39 
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Joined: February 9th, 2009, 16:13
Posts: 1934
Location: Ontario, Canada
Please define errors. My guess is that you saw warnings for slow reading sectors that is not uncommon for most drives during a full scan.

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 Post subject: Re: Can HDD with hidden errors still be considered reliable?
PostPosted: January 29th, 2016, 8:02 
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Joined: October 25th, 2010, 11:50
Posts: 58
Location: Faraway
Errors I mean RED ones in MHDD, not just slow sectors.
(Specially which brick Windows 7 installation and make Windows 7 unrecoverable.)

I understand that misreading is by design of modern HDD technology and are compensated with other techniques.

But hiding/ remapping bad sectors doesn't feel legal in a sense, that it easily leaves false imagination that there is no problems.
Also to get RMA may be difficult due to manufacturer's obscure politics.
Unfortunately it feels like general PC support is not capable to understand SMART.

Comes into mind something like Volkswagen is cheating emissions tests and taking huge fines now.


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 Post subject: Re: Can HDD with hidden errors still be considered reliable?
PostPosted: January 30th, 2016, 0:56 
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Joined: April 22nd, 2015, 20:32
Posts: 176
Location: Portugal
If a car showed you signs of a motor failiure would you call it reliable ?

TBH, even OOTB disks are not realiable, and I know Murphy would back me up on this. 8)

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 Post subject: Re: Can HDD with hidden errors still be considered reliable?
PostPosted: January 30th, 2016, 9:46 
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Joined: December 19th, 2006, 8:49
Posts: 8161
Location: Portugal
Don't use any Seagate drive that is F3 arch (7200.11 and above). The only Seagate drives that you should use are the 7200.10 and below. Of course they will be 500 GB or less in capacity.

If you need a big drive buy Hitachi. Never, EVER use a Seagate. They will just die. Even more never ever re-use a Seagate that already gave you problems, unless it's a ST-10 (7200.10 and below) and you manage to Self-Scan it.

The same for WD drives. When they start to show problems just get a new one, as even Self-Scanning the drive might just be a "temporary" fix that will soon provide to be fatal, even more if you end up storing important data on it without backing it up ....

Testing hard disks with some confidence :

Executing a "Cosmetic Fix" on drives with Bad Sectors :

Assigning slow sectors to the P-List :

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